i have an unlocked javelin from t-mobile, and i'm using my fido simcard here in bc. it is v5.0.0.93, yet i can't download the facebook app from the site. when i downloaded the app from blackberry app world, but everytime i click "run" nothing happens; so basically the facebook app won't download onto my bb. when i try to download facebook app from the site, or from the blackberry site, it says
Notice
Sorry, your device does not meet the system requirements that are needed to support Facebook.
OS 5.0 has many bugs. One of those is that Facebook does not work with it. You really should do your research before installing a beta OS such as 5.0 on your device.
you can back up your phone in desktop manager, save the backup file in your computer. download the OS you want, install it on your PC (i personally use 4.6.1.250). then reinstall it on your phone and after, restore your phone with the backup file u created before. search the forums, theres a more detailed how-to concerning backup/reinstalling OS's.